A method for storing crude oil by using low-permeability and ultra-low-permeability formation

An ultra-low permeability, crude oil technology, applied in chemical instruments and methods, earthwork drilling, drilling composition, etc., can solve the problems of crude oil storage, explosion, and harsh crude oil storage environment in low-permeability and ultra-low permeability formations , to achieve the effect of being beneficial to the generation and expansion, improving the heterogeneity, and improving the production capacity of a single well

Active Publication Date: 2022-04-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN208165750U discloses a storage tank that is used for crude oil transportation and is convenient for temperature adjustment, which mainly solves the problem that the storage environment of crude oil is extremely harsh, and the temperature is too high or too low to cause its explosion
[0004] So far, there have been no public reports on the use of low-permeability and ultra-low-permeability formations for crude oil storage

Method used

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  • A method for storing crude oil by using low-permeability and ultra-low-permeability formation
  • A method for storing crude oil by using low-permeability and ultra-low-permeability formation
  • A method for storing crude oil by using low-permeability and ultra-low-permeability formation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A crude oil-based system is used for crude oil storage, and crude oil with a viscosity of 40 mPas is selected as a solvent. The crude oil-based system is composed of 3% petroleum sulfonate, 1% sodium lauryl carboxylate, and the balance is solvent. The system is under the condition of 100 ℃, the rotation speed is 170s -1 When the shear 1h viscosity is 30mPas.

Embodiment 2

[0052] The crude oil-based system is used for crude oil storage, and crude oil with a viscosity of 50 mPas is selected as a solvent. The crude oil-based system is composed of 4% petroleum sulfonate, 2% calcium lauryl carboxylate, and the balance is solvent. The system is under the condition of 100 ℃, the rotation speed is 170s -1 When the shear 1h viscosity is 40mPas.

Embodiment 3

[0054] Crude oil with a viscosity of 50mPas is selected as the solvent. The mass percent composition of the crude oil-based system is: 5% of petroleum sulfonate, 3% of magnesium dodecyl carboxylate, and the balance is solvent. The system is under the condition of 100℃, and the rotation speed is 170s -1 When the shear 1h viscosity is 50mPas.

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Abstract

The invention relates to a method for storing crude oil in a low-permeability and extra-low-permeability formation. The method includes: injecting crude oil or a crude oil-based system into a low-permeability and ultra-low-permeability formation through reservoir fracturing, and not flowing back after the fracturing is completed, so as to realize crude oil storage or the integration of reservoir fracturing and crude oil storage; The system is composed of petroleum sulfonate, thickener and solvent; the solvent is crude oil or the mixture of crude oil and gasoline, diesel oil, kerosene or condensed oil. The invention is based on the characteristics of low oil price and low-permeability and ultra-low-permeability formation, which can reduce or even eliminate the pollution of the system to the reservoir, and improve the production capacity of a single well; after fracturing, the well can be opened in time according to the consumption demand of crude oil, and the underground storage can be realized. The function of the oil depot.

Description

technical field [0001] The invention relates to a method for storing crude oil by using a low-permeability and ultra-low-permeability formation, and belongs to the technical fields of oil-gas field development engineering and oil-gas storage and transportation engineering. Background technique [0002] At present, governments around the world mainly use surface crude oil storage tanks and underground salt caverns for strategic oil reserves. At the same time, some oil companies use abandoned oil and gas reservoirs to store crude oil or natural gas, and then quickly exploit them in a timely manner to meet market demand. Existing crude oil storage methods require a large amount of investment, and a large amount of daily maintenance work is still required after the construction is completed. In order to ensure the fluidity of crude oil during storage and export and reduce energy loss, CN203170277U provides a crude oil processing and storage and export system. CN208165750U disc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/16E21B43/26C09K8/64C09K8/82
CPCE21F17/16E21B43/26C09K8/64C09K8/82
Inventor 王彦玲白宝君刘忠华
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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